Here’s the deal, coming from someone who switches play from both controller and mouse and keyboard.
Mouse is aim god tier, keyboard for movement is trash. Even if you set custom bindings to your preference. Movement, WASD, crouch, sprint, reload, weapon switch, etc. is far easier on a controller than on a keyboard. Getting out of the net is 1000 times easier on a controller than it is on a keyboard. Playing with a controller is superior in every aspect except aiming, which can be solved easily if the developers expand hit boxes for console players.
That being said, the only real advantage of PC is FPS, which has a real impact on landing your shots correctly. Sadly, this game performance is trash. Even on PC on decent hardware (i7, 1070 Ti) I have to lower my graphics settings if I want constant 60 FPS. On PS4 you are lucky if you get 30 FPS.
In the end, there’s a crossplay off option. Anyone can use it if they feel they are at a disadvantage or advantage. I turn it off always unless I’m playing with randoms.
And whenever I play pred, I always use a controller. Third person with a mouse and keyboard feels awkward to me.